I'am a glow flyer so I can't confirm what what your Axi gold line motor is rated at. Plans call for 2 1/2"-3" main wheels, I used 2 3/4" cause I had them, use what you want. C/G is 2 1/2"-3" back of the wing leading edge checked inboard near the fuselage not at the tips. I ended up at 2 1/2" after flying it. Shear webbing at the spar is not shown on the plans or in the manual, but with your wing uncovered it will be EZ to add. I don't remember if I added them but I probably did as I made other changes to the wing and I like shear webbing on the spar at least for the first several inboard rib sections. None would be needed at the trailing edge, but I added strip ailerons to mine so mine is built a little different. I can make a copy of the manual for you (9 pages) and snail mail them to you (need address) if you want but I am not sure if I can get the plans copied in the small town I live in. Mine is not the slowest flying plane in my hanger but mine is heaver (4lbs, 14oz)with everything I added than yours will be. If you keep yours simple and light it will be a fine trainer. Everything else being equal, a heaver airplane has to fly faster to stay airborn so keep yours light. If you don't already know how to fly then the standard advice of "get help with a buddy box/instructer" applys, if you already fly then this is a EZ solid plane. Do you fly now???